Demonstration of microwave generation by a ferroelectric-cathode tube
- 18 January 1999
- journal article
- research article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 74 (3) , 335-337
- https://doi.org/10.1063/1.123063
Abstract
A ferroelectric cathode is employed in a cyclotron-resonance maser (CRM). The CRM oscillator device operates at ∼ 7 GHz, near the cutoff frequency of a hollow cylindrical cavity. The cathode is made of a PLZT 12/65/35 ceramic with high-dielectric constant (ε r ∼4000). Electrons are extracted from the plasma excited on the cathode surface by ∼ 1 kV short rise-time pulses. The use of ferroelectric cathodes may advance the microwave tube technology for various applications.Keywords
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